Weather StoryAlmanac, microseasons, and the day's weather story.

Kennewick, Washington Weather

Summer heat breaks with monsoon. Day 43 of summer. Read this microseason across nine climate regions →

Kennewick weather forecast — hour by hour, 7-day outlook, NOAA radar

Kennewick, WA
Sunday, August 2 at 9:03 AM
68
°
Clear
Feels like
64°
Humidity
42%
Wind
6 mph
Sunrise
10:40 PM
Sunset
1:25 PM
Kennewick, WA
Hour by hour · 24h
24-Hour ForecastKennewick, WA: 24-hour forecast. Temperatures range from 58 to 83 degrees Fahrenheit.
L 58°H 83°
Kennewick, WA
7-day forecast
  1. Today
    Aug 2
    Clear
    —
    —
    83°59°—
  2. Monday
    Aug 3
    Clear
    —
    —
    83°58°0°
  3. Tuesday
    Aug 4
    Clear
    —
    —
    95°62°+12°
  4. Wednesday
    Aug 5
    Clear
    —
    —
    102°67°+7°
  5. Thursday
    Aug 6
    Clear
    —
    —
    109°72°+7°
  6. Friday
    Aug 7
    Clear
    —
    —
    107°71°-2°
  7. Saturday
    Aug 8
    Clear
    —
    —
    98°67°-9°
Kennewick, WA
Next 24 hours · Cool now
HOT 90°50°70°90°12p6p12a6anow 65°high 83°low 58°
Kennewick, WA
Anemometer · 24h winds · from true
NESW
From · True
WSW
258° · veering 24°
Direction
WSW
258°
Sustained
6
mph
Gust
7
mph
Peak 24h
29
avg 11 mph
Beaufort · 2 · LIGHT BRZ
0
CALM
<1
1
LIGHT AIR
1–3
2
LIGHT BRZ
4–7
3
GENTLE BRZ
8–12
4
MOD BRZ
13–18
5
FRESH BRZ
19–24
6
STRONG BRZ
25–31
7
NEAR GALE
32–38
24h · sust vs gust · mph
avg 11 mph · pk 29 mph @ 4:00p
0102030MPHB1B2B3B4B5B6B7-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 315SUSTGUST
−24h−18h−12h−6hnow
A whisper of wind — leaves barely shift on the trees.
Kennewick, WA
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
999.9
+0.7 mb in 3h · rising · 29.53 inHg
Now
999.9
mb
3h
+0.7
mb
12h
+3.9
mb
24h
+5.2
mb
Regime · RAIN
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 995–1000
9909951000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY1030-21h-18h-15h-12h-9h-6h-3h-24hNOW1000.0994.61000.0
Damp, unsettled regime — wet weather lingers nearby.
Kennewick, WA
Air quality
45
AQI
Good
↓-7 in 6h

AQI 45 (Good), driven by PM2.5. AQI down 7 over the last 6 hours (gradual decline). PM2.5 at 11.5 µg/m³ (AQI 55) with a 0.82 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in stagnant air, not road dust.

OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.

PM 2.5DRIVERGood
11.5μg/m³
PM 10Good
14μg/m³
NO₂Good
5μg/m³
OzoneGood
41μg/m³
UV IndexLow
1.1

What's driving it

PM × Wind × Precip

PM2.5 at 11.5 µg/m³ (AQI 55) with a 0.82 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in stagnant air, not road dust.

PM2.5/PM10
0.82
Wind
light
Recent rain
0h in last 6h
Pattern
stagnant smoke

Trends

Seven days of AQI and PM2.5.

Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).

7-DAY AQI TREND50100SUNMONTUEWEDTHUFRISATSUN7-DAY PM2.5 TREND · μg/m³340
Kennewick, WA
Sky cover · visibility · 24h
Cloud cover
0%
CLEAR
100%0%−24h−18h−12h−6hnow
Visibility
90.3mi
UNLIMITED
172 mi0 mi−24h−18h−12h−6hnow
Earth · GOES-19 ABI
Full Disk · Visible · GeoColor
GOES-19 full disk Visible · GeoColor
True-color daytime, blue/IR sandwich at night
16:03 UTC · Kennewick, WA · NOAA NESDIS / STAR · up to 10848 px
Continental US · GOES-19 ABI
CONUS Sector · Visible · GeoColor
GOES-19 CONUS Visible · GeoColor
Daytime true-color, blue-light/IR sandwich at night
16:03 UTC · Kennewick, WA · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Kennewick, WA
Satellite · infrared · animated
Kennewick, WA
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Kennewick, WA
Almanac · Sunday, August 2
Red sky at night, sailor's delight.
Civil dawn
5:06 AM
Sunrise
10:40 PM
Daylight
14h 45m
Sunset
1:25 PM
Civil dusk
9:01 PM
Planting note
Sow fall peas. Start kale and collard seedlings for fall.
Kennewick, WA
The moon
Waning Gibbous
84% illuminated
Moonrise
9:43 PM
Moonset
10:09 AM
In sign
♓︎ Pisces
Kennewick, WA
Microseason
Aug 1–5

Summer heat breaks with monsoon

plant
Jan 159% of the yearDec 31

Read this microseason across nine climate regions →

Kennewick at a glance

  • Today vs. normal: 12°F above the seasonal normal for this latitude
  • Last frost: May 23 (climatological average for this latitude)
  • Microseason: Aug 1–5
  • Planting window: Sow fall peas. Start kale and collard seedlings for fall.

ZIP codes: 99336, 99337, 99338

16-Day Forecast — Kennewick

  1. Sun83°59°0%
  2. Mon83°58°0%
  3. Tue95°62°0%
  4. Wed102°67°0%
  5. Thu109°72°0%
  6. Fri107°71°0%
  7. Sat98°67°0%
  8. Sun96°65°0%
  9. Mon93°62°0%
  10. Tue98°66°0%
  11. Wed97°69°1%
  12. Thu94°68°6%
  13. Fri97°67°6%
  14. Sat100°68°6%
  15. Sun99°67°10%
  16. Mon93°64°10%

Forecast data from Open-Meteo (CC BY 4.0).

Live wind & temperature near Kennewick

Right now in the garden

Peak growing season

As of August 2, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.

Sun & seasons in Kennewick

Kennewick sits in Benton County, where the year’s longest day runs 15h 47m of daylight and its shortest just 8h 37m — a swing of +7h 10m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.

Seattle, the state’s largest city, lies about 178 miles to the NW. The nearest town Kennewick tracks is Marine View, roughly 54 miles to the N.

Air quality in Kennewick’s county has held roughly steady since 2020; its cleanest year on record was 2024 (median AQI 34). See the full air-quality history for Kennewick.

January 1–5: Deep freeze grips the high peaks.January 6–10: Ice thickens on alpine tarns.January 11–15: Springs stir beneath locked earth.January 16–20: Grouse call from the transition zone.January 21–25: First signals of the soil's turning.January 26–31: Stream water crystallizes thick.February 1–5: The year's coldest fortnight begins.February 6–10: East wind carries a subtle promise.February 11–15: Snowmelt springs whisper beneath ice.February 16–20: Red-wing calls rise from the wetlands.February 21–25: Rain begins to trace the snowline upward.February 26–28: Mist gathers in the warming canyons.March 1–5: Grass and trees stir from their sleep.March 6–10: Hibernators break through frozen ground.March 11–15: First blooms open to the spring sun.March 16–20: Mountain bluebirds return to the summits.March 21–25: Spring equinox at the divide.March 26–31: Aspen catkins burst in clusters.April 1–5: Thunderstorms rumble over granite peaks.April 6–10: Swallows and swifts slice the warming sky.April 11–15: Sandhill cranes call through the wetlands.April 16–20: Rainbows arch over the snowfields.April 21–25: New growth explodes across the montane.April 26–30: Last frost yields to summer growth.May 1–5: Wildflowers crest the high meadows.May 6–10: Summer monsoon clouds gather southward.May 11–15: Snowmelt crests toward the divide.May 16–20: High country wildflowers peak.May 21–25: Summer heat accelerates the growing season.May 26–31: Summer settles into the high country.June 1–5: Pikas hayfeeding in granite peaks.June 6–10: Glacier lily carpets the snowmelt.June 11–15: Paintbrush crowns the ridges.June 16–20: Thunderheads build by noon.June 21–25: Long light holds the peaks.June 26–30: Monsoon moisture drifts north.July 1–5: Monsoon storms drench the south.July 6–10: Wind builds through canyons.July 11–15: Lightning crowns every peak.July 16–20: Elk herds claim alpine meadows.July 21–25: Pika caches reach their peak.July 26–31: Monsoon pulses weaken northward.August 1–5: Summer heat breaks with monsoon.August 6–10: First frost creeps to peaks.August 11–15: Cool wind returns from north.August 16–20: Monsoon clouds gather over the peaks.August 21–25: The monsoon breaks into scattered showers.August 26–31: Summer insects thin as autumn wind rises.September 1–5: Elk descend from summer high meadows.September 6–10: Dew crystallizes on high grass at dawn.September 11–15: Hawks begin the long crossing southward.September 16–20: Equinox: darkness claims the high passes.September 21–25: Thunder retreats as the monsoon dies.September 26–30: First frost hardens the high valleys.October 1–5: October: the aspen stands reach their peak.October 6–10: Aspen gold slides downslope with the chill.October 11–15: Snow settles on the high passes.October 16–20: Elk bugling fades as rut nears its end.October 21–25: First hard frost grips the basin.October 26–31: Late rains settle into November patterns.November 1–5: Aspen canopy falls to earth.November 6–10: Granite bones emerge from cover.November 11–15: Earth begins to harden.November 16–20: Bare ranges hold silence.November 21–25: Snow returns to the peaks.November 26–30: North wind strips the landscape.December 1–5: Deep darkness settles over the ranges.December 6–10: Winter locks the high country.December 11–15: Elk withdraw to winter range.December 16–20: Ice thickens across frozen water.December 21–25: Winter solstice — the sun returns.December 26–31: The year closes in silence.🌱February 14 — First skunk-cabbage spathes thaw their way up☀️March 20 — Spring equinox — day and night balance🌸April 5 — Cherry blossoms peak in the parks🐦May 10 — Warbler migration peaks along the coast✨May 25 — First fireflies scout the meadows at dusk🌞June 21 — Summer solstice — longest day🦗July 25 — Peak cicada chorus in the afternoons🌊August 18 — Warmest sea-surface temperatures of the year🍂September 22 — Autumn equinox — the slow turn❄️October 25 — First widespread frost in the suburbs🍁November 10 — Peak leaf color across the Hudson Valley🌙December 21 — Winter solstice — longest night

Microseason · August 1–5

Summer heat breaks with monsoon

Late summer monsoon surge; southern reaches drench under Gulf moisture; northern peaks cool rapidly as monsoon remnants push north.

Day 214 of 365 · Wedge 43 of 72

The solar year drawn as a wheel of 72 five-day windows. Each wedge is one microseason; the four colored arcs mark winter, spring, summer, and autumn; the small icons sit at notable phenological events. The crimson pointer creeps clockwise as the year turns.

Planting calendar

MonthPlantHarvest
January——
February——
March——
April——
Maylettuce, peas, spinach, radisheslettuce, peas, radishes
Junelettuce, peas, spinach, radishes, tomatoes, peppers, beans, squashlettuce, peas, radishes
Julytomatoes, peppers, beans, squashtomatoes, beans, summer squash
Augusttomatoes, peppers, beans, squash, fall brassicas, garlic (overwinter), carrotstomatoes, beans, summer squash
Septemberfall brassicas, garlic (overwinter), carrotstomatoes, beans, summer squash
October—winter squash, tomatoes (last)
November——
December——

A year in weather

Kennewick peaks at about 77°F in July and bottoms near 36°F in January; January brings the heaviest rain (1.1 inches) and August the least (0.2 inches).

MonthMean tempPrecipRainy days
January36°1.1″4
February40°0.8″3
March47°0.7″2
April54°0.6″2
May63°0.8″2
June69°0.6″2
July77°0.2″1
August76°0.2″1
September67°0.3″1
October55°0.7″2
November43°0.9″3
December36°1.1″4

Regional context

Kennewick's climate, from NOAA NCEI 1991-2020 station normals, pairs 36°F Januarys with 77°F Julys — a 41°F swing. About 7.9 inches of precipitation falls over roughly 27 days a year.

Precipitation in Kennewick peaks in the cool season: January averages 1.1 inches across 4.0 storm-fed days, while August bottoms out at 0.2 inches over just 0.6 rainy days. That cool-season-wet pattern aligns Kennewick with places like West Pasco, WA, Pasco, WA and Finley, WA.

By late-May the frosts ease in Kennewick, opening the season for peas, lettuce, spinach, and radishes. Hold Kennewick's tender crops — tomatoes, peppers, basil — until 10-14 days past Kennewick's last frost. It shuts near early-October, when freezes return to Kennewick and tender plants need cover. Within Kennewick, cold-air pooling chills low spots by 5-10°F, shifting Kennewick's local frost dates.

Similar climates: West Pasco, WA, Pasco, WA, Finley, WA, Richland, WA, Burbank, WA.

Naturalist notes

Late May brings the peak migration of Western Tanagers through the Columbia River corridor.

Apple orchards throughout the region typically begin their bloom period in early April.

Frequently asked

When does it freeze in Kennewick?
Kennewick's last spring frost lands near mid-May, and in Kennewick the first fall frost follows around mid-October.
What is the rainy season in Kennewick?
Kennewick sees its heaviest rain in January (around 1.1 inches), part of roughly 8 inches a year.
What is the warmest month in Kennewick?
On average July tops the year in Kennewick at about 77°F.
What is the coldest month in Kennewick?
The coldest stretch in Kennewick falls in January, around 36°F on average.
When can I start a vegetable garden in Kennewick?
Around mid-May, start frost-hardy crops in Kennewick; tomatoes and basil belong a fortnight later.
How many rainy days does Kennewick get?
Kennewick records around 27 days of measurable precipitation annually.
What hardiness zone is Kennewick?
With January around 36°F, Kennewick's zone reflects that minimum — the USDA ZIP map confirms Kennewick's band.
What is the 10-day forecast for Kennewick?
Kennewick's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
Will it rain this week in Kennewick?
See this week's day-by-day rain chances for Kennewick in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Kennewick?
Current conditions for Kennewick and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Kennewick forecast updated?
The Kennewick forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Kennewick?
Today's sunrise and sunset times for Kennewick are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
How accurate is the weather forecast for Kennewick?
The next few days in Kennewick's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

In Kennewick, Washington, the warm-summer Mediterranean climate runs from about 36°F in January to 77°F in July, a 41°F seasonal range.

Kennewick sees close to 8 inches of precipitation annually, falling across some 27 wet days.

Kennewick's 41°F range, set by its 46.2°N position, drives frost timing and what thrives in Kennewick.

All cities in Washington →

Seattle, WA weather →

ZIP codes in Kennewick

  • 99337
  • 99336
  • 99338

Climate normals from the Open-Meteo Climate API. Köppen approximation from NOAA NCEI U.S. Climate Regions. See methodology for data sources, editorial rules, and corrections. Maintainer: Brian Tighe.